OBSDOCS-1636: Replace foo examples in the docs with a different term

Author: eromanova97

modules/monitoring-removing-alerting-rules-for-user-defined-projects.adoc

@@ -16,9 +16,9 @@ You can remove alerting rules for user-defined projects.
 
 .Procedure
 
-* To remove rule `<foo>` in `<namespace>`, run the following:
+* To remove rule `<alerting_rule>` in `<namespace>`, run the following:
 +
 [source,terminal]
 ----
-$ oc -n <namespace> delete prometheusrule <foo>
+$ oc -n <namespace> delete prometheusrule <alerting_rule>
 ----